harrington



(NoModeL) G. W. HARRINGTON. METHOD OF AND APPARATUS FOR FORMING LINEDPIPE.

PatentedJan. 17,-189'3.

Unirrnn Srnrns GEORGE W. HARRINGTON, OF WAKEFIELD, MASSACHUSETTS,ASSIGNOR OF ONE-HALF TO D. II. DARLING, OF SAME PLACE.

METHOD OF AND APPARATUS FOR FORMING LINED PIPE.

SPECIFICATION forming part of Letters Patent No. 489,950, dated January1'7, 1893. Application filed April 18, 1892. Serial No. 429,559. (Nomodel.)

To all whom it may concern:

Be it known that I, GEORGE W. HARRING- TON, of Wakefield, in the countyof Middlesex and State of Massachusetts, have invent ed certain new anduseful Improvements in Methods of and Apparatus for Forming Lined Pipe,of which the following is a specification.

My present invention relates to a method of and apparatus for makinglined pipe, and has reference more particularly to that class of pipesin which a lining of lead is introduced to protect the main body orshell from the influence 'of the fluid designed to be conveyed by thepipe, as described in a United States patent granted to myself and DavidH. Darling the 28th day of July, 1891., No. 456,927. In pipes of thischaracter heretofore it has been found that handling of the same,jarring and other rough usage has had the effect of loosening the liningfrom the shell or body and thereby injuring the general efficiency ofthe construction.

WVith a view to remedying these faults my invention consists in drawingthe lead into and through the main body or shell, forniing a groovelongitudinally on said lining as it is introduced into the shell andfilling the groove with suitable cement, after which a plug or mandrelis inserted in the lining and the groove forced out against the shell ormain body, thus distributing the cement about the lining to secure thesame to the shell.

My invention further includes means for accomplishing these results, aswill presently appear.

Of the accompanying drawings forming a part of this specification,Figure 1 is a longitudinal section showing the holder, a section of themain body or shell inserted therein, the opening for the cement, and thedevice for forming the groove or recess. Fig. 2 is a section on line 2,2 of Fig. 1. Fig. 3 is a section on line 3, 3 of Fig. 1. Fig. A is asection of the pipe, showing the plug or mandrel for dis tributing thecement about the lining. 5 is a section on line 5, 5 of Fig. 4.

The holder or comprises a hollow section, internally enlarged at one endto receive the end of a section of pipe 8. A hopper or re ceptacle b inthe holder at is adapted to con- Fig.

tain cement, and to convey the same to the interior of the holder. Ahollow section 0 has a flaring end 0 and is screw threaded on theopposite extremity to be inserted in holder at.

This section 0 serves as a guide for the insertion of the lining and isprovided with an aperture d in which a disk 01 is journaled. This diskextends within the periphery of the lining for a certain distance andthus forms a depression or groove therein when said lining is drawnunder the disk. An expansible plug or mandrel g has tapering ends gadapted to exert a yielding pressure upon the lining by springs g, andis suitably secured to any desired means for inserting it into thelining.

The operation will now be clear. A section of the main body or shellhaving been inserted in the holder a, the lining is introduced intoguide 0 and pulled through the holder and into and through the pipe byany suitable means. The disk cl will form the groove f as the liningproceeds, which groove Will be filled with cement from hopper b as fastas the lining is delivered. When the desiredv length of pipe has beentreated, mandrel g is forced through and the groove pressed outwardly,thus driving the cement around the lining and effecting an evendistribution of the same between the main sheet and lining.

Although I have shown a mandrel adapted to exert a yielding pressureupon the lining, it is obvious that a solid mandrel may be used toeffect the desired result. It is also obvious that I am not limited toany particular kind of cement.

I claim:

l. The improved method of making lined pipe, consisting in drawing thelining through the main body or shell, forming a longitudinal depressionin the periphery of said lining as it is drawn into the shell, fillingthe space between the depressions and shell with cement as the liningprogresses, and finally pressing the depressed portion of the liningoutwardly against the iron shell, thus distributing the cement betweenthe shell and lining, substantially as described.

2. An apparatus for making lined pipe comprising a holder adapted toreceive at one end the main body or shell of the pipe, and at the otherend the lining, means such as a revolv- In testimony whereof I havesigned my :0

ing disk whereby said lining is grooved or name to this specification,in the presence of longitndinallyreeessed in its passage through twosubscribing Witnesses, this 11th day of the holder, an openingin saidholder through April, A. D. 1892. 5 which a suitable cement isintroduced into the groove or recess, and a plug or mandrel HARRINGPONfor forcing said groove outwardly to distrilo- Witnesses: ute the cementabout thelining,substantially M. XV. JACKSON, as set forth. A. D.HARRISON.

